{"instruction": "You are an expert in event extraction. Please extract events from the input that conform to the schema definition. Return an empty list for events that do not exist, and return NAN for arguments that do not exist. If an argument has multiple values, please return a list. Respond in the format of a JSON string.", "schema": [{"event_type": "potential therapeutic event", "trigger": true, "arguments": ["Subject", "Treatment.Dosage", "Effect", "Treatment.Drug", "Subject.Age", "Subject.Race", "Treatment.Route", "Subject.Gender", "Combination.Drug", "Treatment.Time_elapsed", "Subject.Disorder", "Treatment", "Subject.Population", "Treatment.Disorder"]}, {"event_type": "adverse event", "trigger": true, "arguments": ["Subject.Population", "Subject", "Subject.Gender", "Treatment.Drug", "Subject.Disorder", "Subject.Age", "Treatment.Route", "Treatment.Disorder", "Effect", "Subject.Race", "Treatment.Dosage", "Combination.Drug", "Treatment.Time_elapsed", "Treatment.Freq", "Treatment"]}], "input": "The former patient had complained once that his visual acuity had decreased after the termination of IFN therapy, and the latter patient complained twice during IFN therapy that his visual acuity had decreased."}
{"potential therapeutic event": [], "adverse event": [{"trigger": "after ", "arguments": {"Subject.Population": "NAN", "Subject": "The former patient", "Subject.Gender": "NAN", "Treatment.Drug": "IFN", "Subject.Disorder": "NAN", "Subject.Age": "NAN", "Treatment.Route": "NAN", "Treatment.Disorder": "NAN", "Effect": "visual acuity had decreased", "Subject.Race": "NAN", "Treatment.Dosage": "NAN", "Combination.Drug": "NAN", "Treatment.Time_elapsed": "NAN", "Treatment.Freq": "NAN", "Treatment": "IFN"}}]}